What does 21 go into?

The number 21 can divide into any multiple of 21, such as 21, 42, 63, 84, and so on. Additionally, it can go into other numbers that can be expressed as a product of 21 and an integer. For example, it goes into 105 (21 x 5) and 210 (21 x 10). In a broader sense, 21 also goes into any number that is a multiple of its factors, which are 1, 3, 7, and 21 itself.